Dynamics of preference-trait coevolution in Model 2.

<p>(A) Initial preferences of the 10% most effective cultural models at the start of a trait's lifetime, for traits that will be successful (red, mean = 0.08) or unsuccessful (black, mean = 0.02, , two-tailed Wilcoxon rank-sum test, the graph shows estimated probability densities). Traits are considered successful if they reach a frequency of at least 0.1. For successful traits, initial preference is calculated as the average preference from the time a trait is introduced until the trait reaches 0.1 frequency. For unsuccessful traits, initial preference is calculated as the average over the mean time required for successful traits to reach 0.1 frequency. (B) Black line: Trait frequency as fraction of the maximum frequency. Red line: Average preference as fraction of the maximum preference. The average is computed over all traits reaching at least a frequency of 0.1, and lasting in the population for at least 50 time steps. Time is measured as proportion of the trait's lifetime. Simulation parameters as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032541#pone-0032541-g004" target="_blank">Figure 4</a>.